Features

This transformer is an energy saving and hermetically closed oil-filled transformer which is produced by winding a core made of Nano-crystalline amorphous glass metal ribbon.

This transformer is capable of being constructed with two to four low voltage windings of foil and a high voltage disc winding.

The transformer can accommodate two asymmetrically loaded systems without mutual influence on the low voltage side, while providing an extremely low core loss under low power consumption. By coupling of multiple low voltage windings and low no load losses resulting in low life cycle
and maintenance costs.

This transformer has 70% lesser no load losses in comparison to traditional laminated core transformers.
This transformer is ideal for large PV plants that work with several central inverters which feed with maximum system yield to the medium voltage grid. Upon request the transformer can be designed with a maximum of four low voltage windings.

This transformer is available in a variety of different vector configurations.

  • Power range of up to 3MVA.
  • High voltage windings up to 36kV
  • Up to 4x low-voltage windings
  • Fully insulated with mineral oil
  • Amorphous metal core glass on request
  • Extremely low no-load losses
  • Manufactured to AS 60076
  • PCB’s, PCT’s and PCBT free
  • Accessories include: oil level indicator, temperature indicator, pressure release valve, Buccholz relay, oil drain valve and optional cable box entry/exit. Please find typical ratings and specifications below, All other versions are on designed on customer request

Technical Specifications

If you’d like to download a detailed data sheet on a particular model, simply click on the rated power.

wdt_IDRATED POWERHVTAPSLVVECTOR CONNECTIONINPEDANCENO LOAD LESSESFULL LOAD LSSESTRANSFORMER WEIGHTOIL WEIGHTDIMENSIONSTECH INFO
15006.6/11/22/33±2.5%, ±5%270/350/370/415/450Dyn1140.886.19103801610 x 110 x 1290Download Spec Sheet
25506.6/11/22/33±2.5%, ±5%270/350/370/415/450Dyn1140.926.29303101610 x 110 x 1290
310006.6/11/22/33±2.5%, ±5%270/350/370/415/450Dyn1141.4810.4314955101900 x 1300 x 1440Download Spec Sheet
412606.6/11/22/33±2.5%, ±5%270/350/370/415/450Dyn115.51.7512.4217506151910 x 1260 x 1620Download Spec Sheet
516006.6/11/22/33±2.5%, ±5%270/350/370/415/450Dyn115.52.1114.8519806301950 x 1610 x 1810Download Spec Sheet
620006.6/11/22/33±2.5%, ±5%415/3.3/6.6Dyn115.52.5217.8224108002050 x 1800 x 2000Download Spec Sheet
725006.6/11/22/33±2.5%, ±5%415/3.3/6.6Dyn115.52.9720.728508502150 x 1960 x 2160Download Spec Sheet
831506.6/11/22/33±2.5%, ±5%415/3.3/6.6Dyn115.53.5124.3319012702285 x 2260 x 2290Download Spec Sheet
940006.6/11/22/33±2.5%, ±5%3.3/6.6Dyn115.54.3228.8375015802430 x 2420 x 2390Download Spec Sheet
1050006.6/11/22/33±2.5%, ±5%3.3/6.6Dyn115.55.1333.03465018302480 x 2580 x 2510Download Spec Sheet

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Item 1 – Cast Resin type Isolation Transformer

HV Winding 1

LV Winding 1

LV Winding 2

Rated power

kVA

315

1250

1250

Rated voltage

kV

33

0.48

0.48

Frequency

Hz

50

Off circuit tapping links

%

±2.5%, +-5%

Nil

Nil

Connection

Delta

Star

Star

Vector group

Dy11y11

Insulation level (Maximum BIL/AC)

kV

150/70

10/3

10/3

Winding material

Aluminium cast windings in quartz filled self-extinguishing epoxy resin

Aluminium cast windings in quartz filled self-extinguishing epoxy resin

Aluminium cast windings in quartz filled self-extinguishing epoxy resin

Type of winding

Vacuum Resin Cast

Vacuum Resin cast

Vacuum Resin cast

Standard

AS 60076-11, AS 2374

Installation

Indoor

Degree of protection

IP22

Type of cooling

AN/AF

Installation altitude

< 1000 a.m.s.l

Climatic/environmental

And fire behaviour class

E2-C2-F1

test